Establishing intra- and inter-vendor reproducibility of T1 relaxation time measurements with 3T MRI

Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine
Yoojin LeeZoltan Nagy

Abstract

Parametric imaging methods (e.g., T1 relaxation time mapping) have been shown to be more reproducible across time and vendors than weighted (e.g., T1 -weighted) images. The purpose of this work was to more extensively evaluate the validity of this assertion. Seven volunteers underwent twice-repeated acquisitions of variable flip-angle T1 mapping, including B1+ calibration, on a 3T Philips Achieva and 3T Siemens Trio scanner. Intra-scanner and inter-vendor T1 variability were calculated. To determine T1 reproducibility levels in longitudinal settings, or after changing hardware or software, four additional data sets were acquired from two of the participants; one participant was scanned on a different 3T Siemens Trio scanner and another on the same 3T Philips Achieva scanner but after a software upgrade. Intra-scanner variability of voxel-wise T1 values was consistent between the two vendors, averaging 0.7/0.7/1.3/1.4% in white matter/cortical gray matter/subcortical gray matter/cerebellum, respectively. We observed, however, a systematic bias between the two vendors of https://doi.org/10.0/7.8/8.6/10.0%, respectively. The T1 bias across two scanners of the same model was greater than intra-scanner variability, although still on...Continue Reading

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Citations

May 22, 2019·Journal of Magnetic Resonance Imaging : JMRI·Kathryn E KeenanKarl F Stupic
May 31, 2019·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Robert ClaeserN Jon Shah
Jul 20, 2019·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Nadège CorbinMartina F Callaghan
Dec 18, 2019·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Rui Pedro A G TeixeiraJoseph V Hajnal
May 19, 2021·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Cameron ManningMichael J Thrippleton
Jun 8, 2021·NMR in Biomedicine·M Ethan MacDonald, G Bruce Pike
Sep 26, 2021·Journal of Applied Clinical Medical Physics·Madeline E CarrLois Holloway
Aug 30, 2021·Medical Physics·Kathryn E KeenanNandita M deSouza

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